ClassID:

92080

C07C67/20 - CPC Classification

Classification description:

Preparation of carboxylic acid esters by conversion of a group containing nitrogen into an ester group from amides or lactams

Recent Application in this class:
#1
20240010604
2024-01-11

OPTIMIZED PROCESS FOR SYNTHESIZING METHACRYLIC ACID (MAA) AND/OR ALKYL METHACRYLATE BY REDUCING UNWANTED BYPRODUCTS

#2
20230416184
2023-12-28

OPTIMIZED PROCESS FOR SYNTHESIZING ALKYL METHACRYLATE BY REDUCING UNWANTED BYPRODUCTS

#3
20230399286
2023-12-14

IMPROVED PROCESS FOR PREPARING METHYL METHACRYLATE AND/OR METHACRYLIC ACID BY REDUCED BACK MIXING DURING CONVERSION

#4
20200399200
2020-12-24

Method for converting N,N-dialkylamide compound into ester compound using complex of fourth-period transition metal as catalyst

#5
20200270195
2020-08-27

Esterification unit for producing crude methyl methacrylate, esterification process using said unit and plant comprising said unit

#6
20200055807
2020-02-20

Method for alcoholysis of amide

#7
20200031754
2020-01-30

Method of producing methyl methacrylate or methacrylic acid

#8
20180215626
2018-08-02

Installation and process for the preparation of hydrogen cyanide

#9
20180079713
2018-03-22

Thermal conversion vessel used in a process for amidification of acetone cyanohydrin

#10
20180079708
2018-03-22

Process for producing fluorinated electrolyte solvent

#11
20170334827
2017-11-23

Reduced fouling process for the production of methyl methacrylate

#12
20170298000
2017-10-19

Reduced fouling process for the production of methyl methacrylate

#13
20170283364
2017-10-05

Method for preparing alpha-hydroxycarboxylic acid esters in which ammonia is recycled

#14
20170144960
2017-05-25

Method for producing alpha-hydroxy carboxylic esters in the gas phase

#15
20170096621
2017-04-06

A METHOD OF PREVENTING POLYMER TAR BUILD-UP IN ACH PRODUCTION OF MMA AND MAA

#16
20160257639
2016-09-08

Esterification unit for producing crude methyl methacrylate, esterification process using said unit and plant comprising said unit

#17
20160251299
2016-09-01

Hydrolysis vessel used in a process for amidification of acetone cyanohydrin

#18
20160194212
2016-07-07

Installation and process for the preparation of hydrogen cyanide

#19
20160176804
2016-06-23

Methods of synthesizing a levodopa ester prodrug

#20
20160137590
2016-05-19

Thermal conversion vessel used in a process for amidification of acetone cyanohydrin

#21
20160137583
2016-05-19

METHOD FOR PRODUCING ALPHA-HYDROXYCARBOXYLIC ACID ESTERS

#22
20150259272
2015-09-17

Process for producing MMA and/or MAA from acetone cyanohydrin and sulfuric acid

#23
20140154758
2014-06-05

Biomass-derived methyl methacrylate and corresponding manufacturing method, uses and polymers

#24
20130338396
2013-12-19

Process for production of methacrylic acid ester having increased yield

#25
20130274505
2013-10-17

Method for producing a lactic ester from a fermentation juice containing ammonium lactate

#26
20130204001
2013-08-08

Process for producing compounds comprising nitrile functions

#27
20120149937
2012-06-14

Method for producing hydroxycarboxylic acid derivative

#28
20120095253
2012-04-19

Method for producing α-hydroxycarboxylic acid ester

#29
20120071686
2012-03-22

Production of diesters from dinitrile compounds

#30
20110318515
2011-12-29

BIOMASS-DERIVED METHYL METHACRYLATE AND CORRESPONDING MANUFACTURING METHOD, USES AND POLYMERS

#31
20110144372
2011-06-16

Method for producing α-hydroxyester compound

#32
20110077424
2011-03-31

Process for recovering valued compounds from a stream derived from purification of methyl methacrylate

#33
20110060159
2011-03-10

Process for preparing carboxamides by hydrolysis carboxylic acid nitriles in the presence of a catalyst comprising manganese dioxide

#34
20100249449
2010-09-30

METHOD FOR AMIDATING OF NITRILE IN THE PRESENCE OF SULFURIC ACID

#35
20100160669
2010-06-24

PROCESS FOR PRODUCING ORGANIC CARBOXYLIC ACID ESTERS

#36
20100099907
2010-04-22

Methods of synthesizing a levodopa ester prodrug

#37
20100069662
2010-03-18

INTEGRATED PROCESS AND APPARATUS FOR PREPARING ESTERS OF METHACRYLIC ACID FROM ACETONE AND HYDROCYANIC ACID

#38
20100069594
2010-03-18

Production by distillation of acetone cyanhydrin and method for producing methacrylic ester and subsequent products

#39
20100056742
2010-03-04

Process and apparatus for preparing alkyl esters of methacrylic acid

#40
20100029881
2010-02-04

Method for producing methacrylic alkyl esters by way of azeotropic distillation

#41
20100004417
2010-01-07

Method for the adsorptive purification of alkyl methacrylates

#42
20090326261
2009-12-31

Preparation of diesters from imide/dinitrile compounds

#43
20090299023
2009-12-03

Method for producing acetone cyanohydrin and the subsequent products thereof by specific cooling

#44
20090209781
2009-08-20

PROCESS FOR PREPARING ALPHA-HYDROXYCARBOXYLIC ACIDS

#45
20090182167
2009-07-16

Process for preparing alpha-hydroxycarboxylic esters

#46
20090124824
2009-05-14

PROCESS FOR PRODUCING 6-HYDROXYCAPROIC ESTER AND PROCESS FOR PRODUCING TRIALKYLAMINE

#47
20070043242
2007-02-22

Method for producing deuterated methyl methacrylate

#48
20060223152
2006-10-05

Optically active 2-allylcarboxylic acid derivative and process for producing the same

#49
20050010064
2005-01-13

Method for purifying spent acid